Twisted is seriously awesome. But I would be very surprised to see it end up in the standard library. Just to start with, twisted as a whole is a huge sprawling mess of variable quality code, so you'd have to extract some small pieces (just the reactor interface?), and even those interfaces probably have stuff in them that you'd want to clean up given how many years its been since they were first designed. And twisted relies heavily on zope-style interfaces, which have been rejected from the stdlib before. And twisted is still a long way from running on Python 3.